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      Interface synthesis for controllable construction of 2D Zn(Bim)(OAc) nanosheets via oil/water system and their application in oil

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          Abstract

          Fabrication of 2D Zn(Bim)(OAc) MOFs-structured nanosheets based on the oil/water interface.

          Abstract

          The aim of this work was to develop a novel interface synthesis for 2D Zn(Bim)(OAc) nanosheets via an oil/water system. This method involved a two immiscible base oil/water phase system, i.e., one of the initial raw materials (metal salt) was scattered in the base oil phase and the other (organic ligand) was dissolved in the water phase. The results revealed that the 2D Zn(Bim)(OAc) nanosheets, with uniform thickness, were formed at the interface between oil and water. A series of characterization techniques were adopted to determine the structure and composition of the so-formed 2D Zn(Bim)(OAc) nanosheets. Furthermore, the preferred organic interface and the formed 2D-layered structure of 2D Zn(Bim)(OAc) nanosheets showed potential in resolving the dispersion and stability issues of the underlying friction reducing additive in oil. Through the comparative analyses of the dispersion and stability of 2D Zn(Bim)(OAc) nanosheets in the three oils (base oil, castor oil, and grease), the interface interaction between Zn(Bim)(OAc) and oil was extensively discussed.

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          Two-dimensional metal–organic framework nanosheets: synthesis and applications

          Synthesis and applications of two-dimensional metal–organic framework nanosheets and their composites are summarized. Two-dimensional (2D) metal–organic framework (MOF) nanosheets are attracting increasing research attention due to their unique properties originating from their ultrathin thickness, large surface area and high surface-to-volume atom ratios. Many great advances have been made in the synthesis and application of 2D MOF nanosheets over the past few years. In this review, we summarize the recent advances in the synthesis of 2D MOF nanosheets by using top-down methods, e.g. sonication exfoliation, mechanical exfoliation, Li-intercalation exfoliation and chemical exfoliation, and bottom-up methods, i.e. interfacial synthesis, three-layer synthesis, surfactant-assisted synthesis, modulated synthesis, and sonication synthesis. In addition, the recent progress in 2D MOF nanosheet-based nanocomposites is also briefly introduced. The potential applications of 2D MOF nanosheets in gas separation, energy conversion and storage, catalysis, sensors and biomedicine are discussed. Finally, we give our personal insights into the challenges and opportunities for the future research of 2D MOF nanosheets and their composites.
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            A two-dimensional π–d conjugated coordination polymer with extremely high electrical conductivity and ambipolar transport behaviour

            Currently, studies on organic two-dimensional (2D) materials with special optic-electronic properties are attracting great research interest. However, 2D organic systems possessing promising electrical transport properties are still rare. Here a highly crystalline thin film of a copper coordination polymer, Cu-BHT (BHT=benzenehexathiol), is prepared via a liquid–liquid interface reaction between BHT/dichloromethane and copper(II) nitrate/H2O. The morphology and structure characterization reveal that this film is piled up by nanosheets of 2D lattice of [Cu3(C6S6)] n , which is further verified by quantum simulation. Four-probe measurements show that the room temperature conductivity of this material can reach up to 1,580 S cm−1, which is the highest value ever reported for coordination polymers. Meanwhile, it displays ambipolar charge transport behaviour and extremely high electron and hole mobilities (99 cm2 V−1 s−1 for holes and 116 cm2 V−1 s−1 for electrons) under field-effect modulation.
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              Two-Dimensional Metal-Organic Framework Nanosheets

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                Author and article information

                Contributors
                (View ORCID Profile)
                Journal
                CRECF4
                CrystEngComm
                CrystEngComm
                Royal Society of Chemistry (RSC)
                1466-8033
                February 9 2021
                2021
                : 23
                : 5
                : 1117-1125
                Affiliations
                [1 ]School of Chemistry and Chemical Engineering
                [2 ]Yangzhou University
                [3 ]Yangzhou 225002
                [4 ]China
                Article
                10.1039/D0CE01624A
                72275bea-2b74-4fb8-966c-bce5a3708f40
                © 2021

                http://rsc.li/journals-terms-of-use

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